They first appeared during the triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is a subject of active research. Scientists first began studying dinosaurs during the 1820s, when they discovered the bones of a large land reptile they dubbed a megalosaurus (“big lizard”) buried in the english countryside Over a thousand dinosaur species once roamed the earth
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Learn which ones were the largest and the smallest, what dinosaurs ate and how they behaved, as well as surprising facts about their.
Get to know the different types of these reptiles that dominated the earth before mammals here
Since there is no way to confirm and classify all the dinosaur families, there is no official taxonomy for them. Dinosaur, the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago and thrived worldwide for nearly 180 million years. Delve into these fast facts about dinosaurs for kids of all ages Discover why the tyrannosaurus had sharp teeth, where the name “dinosaur” comes from, and more
Dinosaurs are a group of reptiles that have lived on earth for about 245 million years. Scientists estimate over a thousand dinosaur species once roamed earth Learn which ones were the largest and the smallest, what dinosaurs ate and how they behaved, as well as surprising facts about their extinction. “there’s kind of a misconception that any big extinct thing was a dinosaur,” smith says
In fact, dinos are a specific group of reptiles
They have been around continuously for more than 200 million years. Learn about different types of dinosaurs, their history, discoveries, size, diets, contemporaries, and much more.
